A kind of thermoplastic starch plasticized by polyionic liquid and preparation method thereof

A technology of polyionic liquid and thermoplastic starch, applied in the field of starch deep processing, can solve problems such as easy migration, and achieve the effect of overcoming easy migration

Active Publication Date: 2021-07-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a small molecule, ionic liquid also has the disadvantage of easy migration.
But there are no related reports

Method used

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  • A kind of thermoplastic starch plasticized by polyionic liquid and preparation method thereof
  • A kind of thermoplastic starch plasticized by polyionic liquid and preparation method thereof
  • A kind of thermoplastic starch plasticized by polyionic liquid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A thermoplastic starch plasticized by polyionic liquid, the thermal processing temperature is 180°C, the tensile strength is 10.37MPa, the elongation at break is 2.25%, the mobility of plasticizer is 0.59%, and the melt index is 6.2g / 10min .

[0036] The preparation method of the thermoplastic starch plasticized by the above-mentioned polyionic liquid is:

[0037] Step a: Weigh cornstarch and polyionic liquid Poly[ECH-MIM]-Cl, 9g and 1g respectively, and set aside;

[0038] Step b: Dissolve 9g of cornstarch in 50mL of deionized water, 1g of polyionic liquid in 50mL of deionized water, then mix the two solutions evenly, and set aside;

[0039] Step c: uniformly stir the mixed solution in step b at a speed of 200 r / min at 100°C, and time it for 60 minutes;

[0040] Step d: drying the mixture obtained in step c at 80° C. for 48 hours to remove moisture to obtain a solid product;

[0041] Step e: Set the heating temperature of the flat vulcanizer to 180°C and the pressur...

Embodiment 2

[0043] A thermoplastic starch plasticized with polyionic liquid, its thermal processing temperature is 170°C, its tensile strength is 4.91MPa, its elongation at break is 6.81%, its plasticizer mobility is 0.33%, and its melt index is 6.2g / 10min .

[0044] The preparation method of the thermoplastic starch plasticized by the above-mentioned polyionic liquid is:

[0045] Step a: Weigh cornstarch and polyionic liquid Poly[ECH-MIM]-Cl, 4g and 6g respectively, and set aside;

[0046] Step b: Dissolve 4g of cornstarch in 50mL of deionized water, 6g of polyionic liquid in 50mL of deionized water, then mix the two solutions evenly, and set aside;

[0047] Step c: uniformly stir the mixed solution in step b at a speed of 250 r / min at 95°C, and time it for 60 minutes;

[0048] Step d: drying the mixture obtained in step c at 80° C. for 72 hours to remove moisture to obtain a solid product;

[0049] Step e: Set the heating temperature of the flat vulcanizer to 170°C and the pressure t...

Embodiment 3

[0051] A thermoplastic starch plasticized by polyionic liquid, the thermal processing temperature is 180°C, the tensile strength is 7.83MPa, the elongation at break is 4.33%, the plasticizer mobility is 0.84%, and the melt index is 6.2g / 10min .

[0052] The preparation method of the thermoplastic starch plasticized by the above-mentioned polyionic liquid is:

[0053] Step a: Weigh cornstarch and polyionic liquid Poly[ECH-MIM]-Cl, 7g and 3g respectively, and set aside;

[0054] Step b: Dissolve 7g of cornstarch in 50mL of deionized water, dissolve 3g of polyionic liquid in 50mL of deionized water, mix the two solutions evenly, and set aside;

[0055] Step c: uniformly stir the mixed solution in step b at a speed of 150 r / min at 100°C, and time it for 90 minutes;

[0056] Step d: drying the mixture obtained in step c at 90°C for 48 hours to remove moisture to obtain a solid product;

[0057] Step e: Set the heating temperature of the flat vulcanizer to 180°C and the pressure ...

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Abstract

The invention discloses a thermoplastic starch plasticized by polyionic liquid and a preparation method thereof. The thermoplastic starch includes corn starch and polyionic liquid. The preparation method is as follows: dissolving cornstarch and polyionic liquid in water respectively, then mixing, heating and stirring; drying the mixed solution to remove water to obtain a solid product; heating and melting the solid product and pressing it into a film to obtain a thermoplastic starch film. Corn starch and Poly[ECH‑MIM]‑Cl form a new hydrogen bond to effectively avoid the hydrogen bond recombination of starch molecules, so that the starch is in an amorphous state and achieves the purpose of thermoplasticity. The thermoplastic starch material prepared by the invention has good thermoplasticity and can be processed repeatedly, and the use of the macromolecule as the plasticizer can effectively reduce the migration of the plasticizer, thereby expanding the application of the starch in the field of thermoplastic materials.

Description

technical field [0001] The invention belongs to the field of starch deep processing, and in particular relates to a thermoplastic starch material prepared by using polyionic liquid as a macromolecular plasticizer and a preparation method thereof. Background technique [0002] Starch is the most common storage form of carbohydrates in plant cells, and it is abundant in seeds and tubers of plants such as corn, wheat, and potatoes. After starch is degraded, it will return to nature in the form of carbon dioxide and water. It is considered to be a natural renewable material that does not cause any pollution to the environment, and it has the advantages of wide sources, low price, easy transportation and storage. In addition to related research and application in the food field, it is also widely used in textile, medicine, papermaking and other industrial fields. The deep processing of starch to make it a thermoplastic material used in the industrial field will further broaden t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L79/04C08J5/18
CPCC08J5/18C08J2303/02C08J2479/04
Inventor 夏于旻汪菁晶梁源刘洁张雯雯赵忠政梁娇娇丁丹宁吕晓洁
Owner DONGHUA UNIV
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